Lemmy Kilminster, the man with the sexiest derriere in rock, joined Metallica onstage at a gig in Nashville, Tennessee last night.

The bassist, sporting his traditional headgear, played two versions of Motorhead songs as part of Metallica's encore. They were 'Damage Case' and 'Too Late Too Late', and you can see footage of the rehearsal below. Watch Metallica AWED:

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